Akuyaku Reijou ni Nanka Narimasen. Watashi wa『Futsuu』no Koushaku Reijou desu! - Chapter 16: Blessings and new name.

A scientific genius named Thomas Harrier was transmigrated to an imperial prince body after a car accident that took his life. He found out that he is in a world similar to our own with a timeline akin to early twentieth century. The body that he is occupying was the imperial prince of a failing empire who suddenly rose to power after a successful assassination attempt of his father. Unaware that the attack is just the beginning of what is to come. He faces many challenges throughout. Will Thomas Harrier be able to live his second life in peace while running an empire and getting it back to its former glory? Or will he succumb into a conspiracy lurking within the country's borders?

Expect some:

Cold war era techs.

Super battleship with advanced electronics, propulsion, and fire control systems?
Helicopters?
Missiles?
Modern medicines and equipment?
AC-130?
A nuke?
Challenger or Abrams or Leopard?
F-4 Phantom or MIG-21?
Colored TV's.

Everything!!!

PS. Cover not mine, I just found it on google.

DING!![You killed a Level 3 Mutant Zombie for the first time!]-----DING!![You have crossed the limit of humanity! Entering the mutation stage!]-----DING!![Congratulations, user! You are now a being beyond human beings!]-----Being a good person cost him his life. When death sent him back, he vowed to take revenge and finish the job.Behind the icy cold that grips the world and the red light that fills the sky day and night, he must defy the zombie apocalypse.A safe house, unlimited food and drink, every conceivable weapon and a system to help him... But he has only two things on his mind: Survival and revenge.

In an era where humanity has long conquered the stars, a girl with a restless heart yearns for more than the predictable comforts of galactic life—she wants to explore the cosmos for herself. But her dream is torn apart when she’s stranded on a forgotten planet, a dumping ground for criminals with no way out.Left to rot among the desperate and the damned, she stumbles upon a strange machine buried in the scrap heap of discarded tools by higher classed planets—one that fuses with her psyche and grants her access to a system unlike anything in known space. It doesn’t just guide her. It evolves with her. It builds. It changes everything.Now she’s on the run, pursued by the relentless interstellar police who want back what she stole. But with each escape, each discovery, and each battle, she pushes further into the unknown, reshaping the wreckage of the past into something new.Blending the inventive spirit of technical progression with the high-octane energy of cinematic battles, this is a story of survival, rebellion, and rebuilding—one shattered world at a time.

Maria is a werewolf of the Veilwood Pack, where every woman is born with a gift. But with her twenty-first birthday drawing near and no ability to call her own, her family arranges a marriage that feels more like a cage than a future.On the run from a fate she refuses to accept, Maria narrowly escapes a predator who wants to claim her for himself. Shaken and desperate, she stumbles into the arms of another man whose eyes burn with recognition—her mate.But the predator is still out there, and he wants Maria just as much.Torn between the mate who awakens her heart and the danger that tempts her into the shadows, Maria finds herself desired by two men who will stop at nothing to claim her.Love, obsession, and destiny intertwine, and her choice could cost her everything.